An example of a valid SRCPARAM input card for an open pit source is given below:
where the source ID is NORTHPIT, the emission rate is 1.15E-4 g/(s-m2), the release height is 0.0 m, the X-dimension is 150.0 m, the Y-dimension is 500.0 m, the pit volume is 3.75E+6 cubic meters (corresponding to an effective pit depth of about 50 meters) and the orientation angle is 30.0 degrees clockwise from North.
Since the OPENPIT algorithm is applicable for particulate emissions, the particle categories for an open pit source must be defined using the PARTDIAM, MASSFRAX, and PARTDENS keywords on the SO pathway.
3.3.3 Specifying Building Downwash Information
As noted above, the ISC models include algorithms to model the effects of buildings downwash on emissions from nearby or adjacent point sources. The building downwash algorithms do not apply to volume, area or open pit sources. For a technical description of the building downwash algorithms, the user is referred to Volume II of the ISC User's Guide. The ISC models use direction‑specific information for all building downwash cases.
There are three keywords that are used to specify building downwash information, BUILDHGT, BUILDWID, and LOWBOUND. The syntax, type and order for the BUILDHGT keyword, used to input direction specific building heights, are summarized below:
SO BUILDHGT Srcid (or Srcrng) Dsbh(i),i=1,36 (16 for LT)
Must follow the LOCATION card for each source input
where the Srcid parameter is the same source ID that was entered on the LOCATION card for a particular source. The user also has the option of specifying a range of sources (the Srcrng parameter) for which the building heights apply, instead of identifying a single source. This is accomplished by two source ID character strings separated by a dash, e.g., STACK1‑STACK10. Since the model reads the source range as a single input field there must not be any spaces between the source IDs. The model then places the building heights that follow (the Dsbh(i) parameter) into the appropriate arrays for all Srcid's that fall within that range, including STACK1 and STACK10.
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castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
français: DIS CUS DES RAD